Coke oven doors



M. M. WLM'CZWOFF Umm @VEN DOCRS www., HW,

3 shee-mmsneet l Filed May 8, 1946 ff//A U, 1949 A. A. RACKOFF 294%831COKE vOVEN DOORS Filed May 8, 1,946 3 vSheets-Sheet 2 COKE OVEN DOORSFiled May e, i946 3 sheets-sheet 3 IN V EN TOR.

@m MMM@ Patented Dec. 20, 1949 UTN PAT E NTV UFFICE COKE OVEN DOORSAdolphAgRackofE, deceased, late of Gary, Indaby ,Sidney Krieger,administrator, Gary, Ind., as-A .signor to Alois W. Graf Application May8i, 1946, Serial N o. 66,1455` 5 Claims. .l

This invention relates. to an improvement in coke oven doors.

The doors used `atpresenton.coke ovens must be lifted entirely oir the.door l:traine and carried away vby a. machine called a. door extractor.ASome doors are made gasitight byi luting.. that is, packing clayaround. the cracks of the door. @ther doors are self-sealing that isthey have a .knife edge which bearsion. .the door frame under springpressure. VxIlrerrIi-t"y isflesired. to open the coke oven door theextractor unlatches the door, .lifts it orf its supportgsand.thencarries it away. Since the .doors are iti requires a heavy.extracting machine. to: handle them'. On the vpusher `side of theloven! the extractor is included asf` part of .thepusher,. While onthe"` disicharge side` it is an` independent machine. To make even minorrepairs itis. necessary to remove` the door anclf install? another.`door in its place. These doorsare unsatisfactory becamse of thediicu'lties of maintenance and" because` of the heavyand.expensivemachinerynecessary/tto open and` close them.

It is an object off this; invention .to-provide an improved cokeiovezrdoor which need not be removed When the coicef-ispusliedtoutof theoven'.

It isa further object of; invention to pro*- vide an` improvedcolceoven. doorstrueture which isE economical to operate and; maintain'.

It. is another object .of tirate-invention. to provide a rotating doormounted. on pivots and shaped:A so that' it; willallawf a: clear passageof the coke and ramrwhenr swungt'o an: openposition.

Another object ofthis inyention i'sto: provide suche. door'whichcanbesil-nngthrough anan'gle of 180 to' provide.- forinspectom andrepair of its refractoryface.

These and other cxbects' will bemore" apparent after referring. totheffollow-ing' specification an attached drawings. iniwhich:

Figure 14 a `frontielc-iva'tion.oibl the door in place in closed:position;

Figure 2l is a` sectional..vitaes taken: on'the line 22-2 of Figure 1.;

Figure 3 is a. top plair view'taken1-on1the line 3--3 of Figure-:2;

Figure'lt is a sectional vi'ewftekenen` the-line 4-4`of Figure 2';

Figure 5isV axsectionalv-iew takenon the line 5--52 of Figure 2;.

ligure'disaviewsmilar tirEgure but showing the door openrpositbmr Figure7 is a lsectional.vienrtekenen?.the line 'le-J ofi Figure'. 2;.,

Figure 8 is a sectionalview taken onfthe line .8 8 of Figure 2;

Figure 9 is an enlarged horizontal sectional view of the door frame;

Figure 10 is' a front.elevation` of the top portion of the door frame;

Figure l1 is a sectional Viewv takenon the line tI--ll of Figure 9; andvFigure 12 is a plan vewof a coke oven showing. a door in variouspositions.-

Referring more particularly to; the drawings, the coke oven hasan'`entrance 2 into the coking chamber. It will .be understood that .thecoking `chamber is of substantially the' same cross seetional shapethroughoutfits length'- and that the doors at the pusher endl. and .thecoke end will `be of the same type although the width of the chamber atvthe pusher' end isslfightly less than that at the coke end. Therefractory brick work 4 of the oven.-` has` an". embedded metallic' doorframe 6. On` each side of thefopening' 2 are the conventional verticalleuckstaysj 8. As best shown in Figures 9, l0 andi 115,v the door frame"has a cylindrical. concave inner surface t0 at each side anda flat uppersurface |12?. The' door frame" is fastened to the buckstays 8 inanysuitable manner. As shown, a bolt t4 passes' through a plate I5 andis fastened to` thebuckstays 8'. The plate I5 bears against the frame" 6and holds it ihL posil tion'. The `door `loody I6 has a cylindricallyshaped convex inner surface I8 which' is connected by a relativelystraight outer surface 2U. The door body is made of a. reinforcing metalskeleton 2'2 which may be a single casting.' or may be fabri- 1 catedfrom a plurality' of parts' riveted or welded together. The. flanges 24of the reinforcing skeleton 22` are cylindrically' shaped and havesubstantially the sa'm'efradius' as the cylindrical surfaces lll of thedoor seat; The skeleton 22 ist filled with a? refractory' material 256which" is set back of the flanges 24 to' provide a' certain clearaifice2S; A seal-ing" groove: 30" is out in the door` bodyilanges 24 and'extends entirely around thedoor body. The groove 31l`lia's an inlet'32and ner. Beneath the plate 42 is a cam 44 which is fastened and keyed tothe trunnion 38 by a bolt 46 and a key 41. Adjacent the cam 44 is aplate 48 which provides a surface against which the cam 44 bears.Extending outwardly below the plate 48 is a bracket 5U having a bore 52threaded on its outer end for receiving a spring loaded screw 54. Acamfollower 56 is provided in the bore 52 and a spring 58 presses itagainst the cam 44. Connected to the top of skeleton 22 is a toptrunnion bracket 68. A trunnion pin 62 is tightly keyed to the toptrunnion bracket 6D by means of a key 63 and extends upwardly through abushing 64 which has a square outer surface. A bevel gear 66 and a cam68 are keyed to the top of the pin 62 by means of a key 69. Meshing withthe bevel gear 66 is a bevel pinion gear 10 which is mounted on a pin 12for movement therewith. The pin 'I2 is carried in bearings 14 of a bevelgear housing 16 and has a square outer end 18 which is received in thesocket 88 of the power driven wrench. On the pusher side of the cokeoven the wrench may be mounted on the pusher while on the coke side thewrench is separately mounted. The square bushing 64 i'lts in a slottedhole 82 of a bracket 84 which is attached to the'coke oven in anysuitable manner and has a permissible movement 86 which equals the throwof the cam 68. Similar clearance 88 is provided in the plate 42 topermit clearance between the door body and door frame during rotation ofthe door frame. The cam 68 also is provided with abearing plate 48, abracket 50 having a bore 52, and a spring biassed cam follower 58, allarranged around the cam 68 in the same manner as around the cam 44 asdescribed above. A pocket 90 is provided in the outer surface of thedoor for picking up and handling the doors when they are being replaced.

When it is desired to close the doors for coking, the socket 88 of thewrench is placed over the square head 78 of shaft l2. The wrench is thenrotated which rotates pin 62 through bevel gears 66 and lil. After thedoor is rotated through an angle of about 90 from the open positionshown in Figure 6 to the closed position shown in Figure 5, the rotationis stopped and the wrench removed. During this rotation the cams 44 and68, respectively, bear against their respective cam followers 56 toslide the door through the distance 86 and 88, thus forcing it againstits seat. The sealing solution is then pumped into the groove 38 throughthe inlet 32. rThis closed position of the door is shown in full linesin Figure 'i2 and is indicated as position A. When it is desired to openthe door to discharge the coke from the oven, the door is rotated inlike manner through an angle of 90 to either position B as shown inFigure 12. During this movement the cams 44 and 68 bear on the surfacesof plates 48 to break the seal. The distance between the door pivotbolts 46 and 62 and the outer door surface 2G is equal to approximatelyone-half of the width of the opening 2 so that when the door is rotatedthrough an angle of about 90 from the closed position, the entire dooris back of the side walls of the coke oven as shown in Figure 12. Thispermits the pusher ram to push the coke from the oven withoutinterference. When it is desired to open the doors for inspection or forrepairing the inner surface thereof, they are rotated 180 from theclosed position. This throws the surface I8 to the outside as shown inposition C in Figure 12 so that the refractory 25 can be repaired.

While one embodiment of the invention has been shown and described, itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

What is claimed is:

l. In a coke oven the combination comprising a cylindrical door seat,; adoor ,body having a cylindrically shaped inner surface, the cylindricaldoor seat and cylindrical inner surface having substantially the sameradius, a grove in said door for providing a seal between said surfaceand said seat, top and bottom pins spaced outwardly from the outersurface of said door for pivotally supporting said door body, means forpermitting movement of the pins toward and away from the door seat, acam mounted on each of the pins, an inner surface against which the cambears to break the seal when the door is opened, and an outer surfaceagainst which the cam bears to lhold the door body against the seat whenthe door is closed.

2. A coke oven door comprising a cylindrical concave door seat, a doorbody having a cylindrically shaped convex inner surface connected by arelatively straight outer surface, the cylindrical door seat andcylindrical inner surface having substantially the same radius, a groovein said door for receiving sealing material to produce a seal betweensaid seat and said door, top and bottom pins spaced outwardly from saidouter surface for pivotally supporting said door body, means forlinearly moving the pins toward and awayv from the door seat, includinga cam mounted on each of the pins, an inner surface against which thecam bears to break the seal when the door is opened, a spring biassedouter surface against which the cam bears to hold the door body againstthe seat when the door is closed, and means for rotating said door.

3. A coke oven door comprising a cylindrical door seat, a door bodyhaving a cylindrically shaped inner surface connected by a relativelystraight outer surface, the cylindrical door seat and cylindrical innersurface having substantially the same radius, a groove in the innersurface of said door extending adjacent its edges for receiving sealingmaterial to produce a seal between said door and said seat, conduitsinterconnecting said groove with the outer surface of said door, top andbottom pins spaced outwardly from said outer surface for pivotallysupporting said door body, means for moving the pins toward and awayfrom the door seat, including a cam mounted on each of the pins, aninner surface against which the cam bears to break the seal when thedoor is opened, and an outer surface against which the cam bears to holdthe door body against the seat when the door is closed.

4. In a coke oven,v the combination comprising a door seat havingvertical sides in the form of sections of a cylinder, a door body havinga cylindrically shaped inner surface and a generally flat outer surface,said inner surface and said vertical sides of said door `seat havingsubstantially identical radii, top and bottom pivot supports for saiddoor spaced Voutwardly from said flat outer surface, a sealing grooveprovided in the inner surface of said door body adjacent the edgesthereof, conduits interconnecting said groove with the outer surface ofsaid door whereby sealing material may be supplied to said groove, a cammounted adjacent each of said pivot supports, means for rotating saidcams and said door body, inner surfaces against which said cams bear tobreak the door seal, and resiliently biassed outer surfaces againstwhich said cams bear to hold the door body against said door seat.

5. In a coke oven the combination comprising a door seat having concavesurfaces, a door body having inner convex surfaces generallycomplementary to the concave surfaces of said seat, said door bodyhaving a generally iiat outer surface, supporting means located atopposite ends of said door body, a pivotal connection formed in eachsupport for rotating said body about an axis displaced from said outersurface, a cam connected to each pivotal connection for producing alinear horizontal movement of said connections and said body, and meansfor rotating said cams and said body through an arc of 90 Whereby the atouter surface of said door will be parallel to the vertical edge of saiddoor seat and said door seat will be unobstructed.

SIDNEY KRIEGER,

Administrator of the Estate of Adolph A. Racko,

Deceased.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number 20 Number Great Britain ca. Sept. 7, 1911France Sept. 10, 1929

